Ladies thoughts please.. Preg or not?

My AF in May was light, as well as in June and it was only 4 days instead of six. When I should have ovulated this month I had spotting. No baby dance since middle of May. 3 hpt all negative. Went to ob/gyn two weeks ago they said physical exam cervix was fine no obvious cause for bleeding. They did another pt(urine) and it was negative. My TSH levels are high end of normal and have been that way for a while. My AF this month is 1 week late, but I feel bloated, but cm show no signs that it will start. I keep thinking there is no way I am pregnant, but I have been told it is still possible. Is it worth asking for a blood test? We have been trying TTC for 2+ years DH has low testosterone that can't be supplemented due to heart, so the process has been real slow.